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C1921-3G-S-K9
Cisco 1900 Series Wireless WAN Bundle C1921-3G-S-K9
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C1921-3G-S-K9 is a fixed, enterprise-class integrated services router engineered for branch offices requiring versatile connectivity and high-performance data routing. It delivers a robust architecture that consolidates wired Ethernet and integrated 3G wireless capabilities, ensuring continuous WAN access while supporting advanced routing protocols, multi-protocol VPN services, and built-in firewall security.
Designed for demanding business environments, this router offers flexible power options via an AC power supply and features two 10/100 Ethernet ports providing dedicated LAN/WAN connectivity. With modular expansion through an EHWIC slot, integrated voice/video services, redundancy features for high availability, and QoS capabilities to ensure prioritized traffic, the C1921-3G-S-K9 is ideally suited to small enterprise and branch office use cases that require secure and reliable multi-service connectivity.
C1921-3G-S-K9 price is $1,038.00, a 48% saving from the Cisco list price of $1,995.00. C1921-3G-S-K9 is in stock and available for next-day dispatch. (terms applied)
Request bulk order quote for C1921-3G-S-K9 for additional pricing. Browse the full Router Isr 1900 series or explore all Cisco products.
In a national retail chain, remote stores deploy the C1921-3G-S-K9 Cisco 1900 Series Wireless WAN Bundle to maintain always-on connectivity. The integrated 3G cellular modem provides automatic LTE failover when primary links fail, securing POS transactions and inventory management. Benefit: uninterrupted operations, PCI-compliant data security, and enhanced customer experience.
Public safety agencies leverage the C1921-3G-S-K9 Cisco 1900 Series Wireless WAN Bundle in mobile command vehicles at disaster sites. The router establishes secure VPN tunnels over 3G networks, enabling real-time video streaming, incident management dashboards, and interagency coordination. Benefit: high-availability communications, rapid deployment, and encrypted data exchange under critical conditions.
A manufacturing enterprise uses the C1921-3G-S-K9 Cisco 1900 Series Wireless WAN Bundle to connect remote production sites and IoT sensor networks. The device aggregates machine data over 3G links into a centralized analytics platform while enforcing firewall and QoS policies. Benefit: improved operational visibility, reduced latency, and simplified IoT infrastructure management.
To get the detailed certification, please go to the Compliance Center.
| C1921-3G-S-K9 |  CISCO1941W-N/K9 |  C1921-3G-V-K9 |  C1941-SEC-SRE/K9 |  CISCO1941-HSEC+/K9 | |
|---|---|---|---|---|---|
| 5G Support | No | No | No | No | No |
| Architecture | Fixed | Fixed | Fixed | Fixed | Fixed |
| Broadband | 3G | N/A | 3G | N/A | N/A |
| Built-in Security Features | Firewall / Intrusion Prevention | Firewall / Intrusion Prevention / Malware Protection | Firewall, Intrusion Prevention, Encryption | Firewall / Intrusion Prevention | Firewall / Intrusion Prevention / Malware Protection |
| Compliance Standards | FCC / CE | FCC / CE | FCC, CE | FCC, CE | FCC / CE |
| Connectivity Type | Wired | Wired / Wireless | Wired | Wired | Wired / Ethernet |
| Depth | N/A | 9.4 inches | N/A | 12.3 inches | N/A |
| Device Type | Router | Router | Router | Router | Router |
| EMC | N/A | N/A | N/A | FCC, CE | N/A |
| Ethernet Technology | 10/100 | 10/100 | 10/100 Ethernet | 10/100 | 10/100 |
| Expansion Slots | EHWIC | EHWIC | EHWIC | EHWIC | EHWIC |
| Features | VPN / Firewall / IPv6 Compatible / Integrated Services | VPN / IPv6 Compatible / Firewall | VPN, IPv6 Compatible, Firewall, Encryption | VPN / IPv6 Compatible / Firewall / Syslog | VPN / Firewall / IPv6 Compatible |
| Firewall Features | Yes | Yes | Yes | Yes | Yes |
| Flash Memory | 256 MB | 256 MB | 256 MB | 128 MB | 256 MB |
| Form Factor | Desktop / Rack-mount | Desktop | Desktop | Rack-mount | Desktop |
| Height | N/A | 1.7 inches | N/A | 1.73 inches | N/A |
| High Availability Support | Supported | Not Supported | Supported | Supported | Not Supported |
| Integrated Services | Voice / Video / WAN Optimization | Voice / Video | Voice, Video, WAN Optimization | Voice / Video / WAN Optimization | Voice / Video / WAN Optimization |
| Interface Ports | RJ-45 | RJ-45 | RJ-45 | RJ-45 | RJ-45 |
| LAN Ports | 2 LAN Ports | 4 LAN Ports | 2 LAN Ports | 4 LAN Ports | Modular LAN |
| Management | Managed | Managed | Managed | Managed | Managed |
| Memory | 256 MB | 256 MB | 256 MB | 512 MB | 256 MB |
| Modular Slots Available | 1 Slot | 2 Slots | 2 Slots | 2 Slots | 2 Slots |
| Network Protocols | IPv4 / IPv6 | IPv4 / IPv6 | IPv4, IPv6 | IPv4, IPv6 | IP / TCP / UDP / OSPF / EIGRP / BGP / RIP / ICMP |
| Power | 65 Watt | 85W | 65 Watt | 50 W | 55W |
| Power Source | AC Power Supply | AC Power Supply | AC Power Supply | AC Power Supply / DC Power Supply | AC Power Supply |
| Product Name | Cisco 1921 Integrated Services Router (C1921-3G-S-K9) | Cisco 1941 Integrated Services Router with Wireless | Cisco 1921 Integrated Services Router 3G Voice | Cisco 1941 Security Services Router (C1941-SEC-SRE/K9) | CISCO1941-HSEC+/K9 |
| Product Type | Enterprise Router | Enterprise Router | Enterprise Router | Enterprise Router | Enterprise Router |
| QoS Features | Supported | Supported | Supported | Supported | Supported |
| Remote Management | CLI / SNMP / SSH | SSH / Telnet / SNMP | SSH, Telnet, SNMP | SSH, Telnet, SNMP | CLI / SNMP / Telnet / SSH |
| Routing Protocols | OSPF / BGP / EIGRP / RIP / Static Routing | OSPF / BGP / EIGRP / RIP / Static Routing | OSPF / EIGRP / BGP / RIP / Static Routing | OSPF / BGP / EIGRP / RIP / Static Routing | OSPF / BGP / EIGRP / RIP / Static Routing |
| Safety | N/A | N/A | N/A | UL/cUL | N/A |
| Speed/Capacity | Fast Ethernet | N/A | 100 Mbps | N/A | N/A |
| Stacking Capability | No | No | No | No | No |
| Telecom | N/A | N/A | N/A | TIA/EIA | N/A |
| Throughput Capacity | 100 Mbps | 0.025 Gbps | 75 Mbps | 0.075 Gbps | 0.075 Gbps |
| Use Case | Enterprise / Small Business | Small Business | Business, Branch Office | Enterprise | Enterprise / Small Business |
| VPN Support | IPSec / SSL VPN / DMVPN | IPSec / DMVPN | IPSec / SSL VPN / DMVPN / FlexVPN | IPSec / SSL VPN / N/A / N/A / N/A / N/A | IPSec / SSL VPN / DMVPN |
| WAN Configuration | WAN | Dual WAN | WAN | Dual WAN | Dual WAN |
| WAN Ports | 1 WAN | 2 WAN | 2 WAN Ports | 2 WAN | 2 WAN |
| Weight | N/A | 8.8 lbs | N/A | 7 lbs | N/A |
| Wi-Fi Standard | N/A | WiFi 4 | N/A | N/A | N/A |
| Width | N/A | 8.3 inches | N/A | 17.5 inches | N/A |
| Wireless Support | No | Yes | No | No | No |
Reliable 3G router that performs consistently well. Setup is easy, and it has been running smoothly for our remote teams.
Perfect for remote offices with 3G connectivity. It works well and offers good performance for both WAN and failover.
The 3G WAN connectivity is stable and the router has been reliable in our remote locations. No complaints so far.
Solid 3G WAN solution for our branch offices. Provides stable, consistent service and simple configuration.
Dependable and easy to manage. Great choice for locations relying on 3G connectivity for backup WAN.
The Cisco 1900 Series Wireless WAN Bundle C1921-3G-S-K9 is a modular branch router with embedded 3G WWAN, dual Gigabit Ethernet ports, and integrated Cisco IOS security services for secure, reliable WAN connectivity.
The C1921-3G-S-K9 offers embedded HSPA+ 3G connectivity, modular WAN interface slots, IPsec VPN acceleration, Zone-Based Firewall, dual Gigabit Ethernet ports, and Cisco IOS SD-WAN readiness.
It includes a 1.2 GHz dual-core CPU, 256 MB DRAM, 64 MB Flash, one onboard 3G WWAN card slot, two integrated Gigabit Ethernet ports, and a console port.
It supports 3G HSPA+ and HSUPA technologies with backward compatibility to GSM, GPRS, and EDGE networks for broad carrier interoperability.
It supports IPsec VPN, SSL VPN, Zone-Based Firewall, Secure Boot, Trust Anchor module, Network Address Translation (NAT), and Cisco IOS intrusion prevention.
Install the C1921-3G-S-K9 at branch offices or remote sites, insert a compatible 3G SIM, configure Cisco IOS via CLI or Cisco Configuration Professional, and connect LAN/WAN interfaces.
Yes. Its compact form factor, integrated 3G WWAN, enterprise-grade security, and flexible licensing make it ideal for SMB branch networking and mobile deployments.
Yes. It supports dual WAN connectivity with automatic failover and load balancing between 3G WWAN and Ethernet WAN interfaces.
Enable the cellular interface in Cisco IOS (interface cellular 0), set the APN and authentication parameters, insert the SIM card, and verify status with show cellular interface commands.
Manage the C1921-3G-S-K9 via Cisco Prime Infrastructure, Cisco DNA Center, Cisco Configuration Professional, SNMP, NETCONF/RESTCONF, and CLI.
Yes. You can upgrade the IOS image using TFTP, FTP, USB, or Cisco Smart Software Manager to install the latest feature-rich and secure releases.
The C1921-3G-S-K9 delivers up to 85 Mbps of IP routing throughput, depending on the feature set and security services enabled.
Cisco provides a Limited Lifetime Warranty with one-year next-business-day replacement, and optional SMARTnet support tiers for 24x7 hardware and software coverage.
Yes. Cisco-authorized partners supply replacement power supplies, fan modules, WAN interface cards, and cellular card kits for the C1921-3G-S-K9.
It meets ENERGY STAR requirements and uses low-power processors with efficient power supplies to minimize energy consumption in branch deployments.
Consider the base hardware cost, required IOS software feature licenses (SEC, ADV), optional SMARTnet support, and regional 3G carrier compatibility fees.